|Publication number||US6691806 B2|
|Application number||US 10/181,681|
|Publication date||Feb 17, 2004|
|Filing date||Feb 2, 2001|
|Priority date||Feb 8, 2000|
|Also published as||DE10005527A1, EP1254044A1, EP1254044B1, US20030015356, WO2001058743A1|
|Publication number||10181681, 181681, PCT/2001/1116, PCT/EP/1/001116, PCT/EP/1/01116, PCT/EP/2001/001116, PCT/EP/2001/01116, PCT/EP1/001116, PCT/EP1/01116, PCT/EP1001116, PCT/EP101116, PCT/EP2001/001116, PCT/EP2001/01116, PCT/EP2001001116, PCT/EP200101116, US 6691806 B2, US 6691806B2, US-B2-6691806, US6691806 B2, US6691806B2|
|Inventors||Werner Wolfgang, Hubert Hund, Thomas Rösch, Bruno Walter|
|Original Assignee||Zf Friedrichshafen Ag|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (9), Referenced by (36), Classifications (18), Legal Events (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
The invention concerns a drive unit for a tracked vehicle according to the pre-characterizing portion of the principle claim.
In tracked vehicles, especially ones used for military purposes, the drive unit is required to be extremely reliable. Even if the vehicle is partially damaged, it must be guaranteed that the vehicle can be moved out of a danger zone without outside help.
In electrically driven tracked vehicles emergency operation can be maintained because the aggregates on either side can be coupled to one another. EP 0 924 132 A2, which is considered to be the closest prior art, describes a drive unit for a tracked vehicle that consists of two drive units arranged on either side of the vehicle body. Each drive unit has a drive motor, which drives an electric generator. The drive tracks can be driven by associated electric motors.
DE 195 37 945 A1 shows a drive unit for a tracked vehicle, in which the power is divided among 4 motors.
The purpose of the invention is to provide a drive unit for a tracked vehicle, which ensures greater reliability and operating security even when the vehicle is partially damaged. In addition, standard components and aggregates of suitable structural volume should be able to be used.
This objective is achieved by a drive unit for tracked vehicles, which also embodies the features of the characterizing portion of the principle claim.
According to the invention, a first and a second right-hand electric drive motor are associated with the right-hand drive track and a first and a second left-hand electric drive motor are associated with the left-hand drive track. The two first drive motors are fed by a first generator and the two second drive motors are fed by a second generator.
The result is that if any component of the drive unit is out of action, the tracked vehicle can still be driven and steered. For example, if the first internal combustion engine or the first generator is out of action, the second combustion engine and the second generator, and the second left-hand and second right-hand drive motors are still there to drive the two drive tracks. If one or both first drive motors or one or both second drive motors fail, there is still a drive motor available to drive each drive track.
In an advantageous embodiment of the invention, each drive track is associated with a summation unit by means of which the drive power respectively of a first and a second electric drive motor is coupled to a track drive wheel. Compared with an arrangement in which each drive track is respectively driven by a front and a rear track drive wheel, this has the advantage that stresses in the drive track are avoided.
If the generators and electric drive motors are alternating-current machines, the energy paths can advantageously be wired as follows: the output of the first generator is connected electrically to the input of a first rectifier. The output of the second generator is electrically connected to the input of a second rectifier. The output of the first rectifier is simultaneously connected electrically to the input of a first left-hand and a first right-hand DC/AC converter. The output of the second rectifier is simultaneously connected electrically to the input of a second left-hand and a second right-hand DC/AC converter. The output of each DC/AC converter is connected electrically to the input of an associated drive motor.
The invention will now be described, by way of example, with reference to the accompanying drawings in which:
FIG. 1 schematically illustrates the components of the drive unit and their wiring.
The output of the alternating-current generator 6 driven by the first combustion engine 10 is connected electrically to the input of a first rectifier 58. The output of this rectifier 58 is divided into two paths. It is connected electrically, simultaneously to the input of a first left-hand DC/AC converter 60 and a first right-hand DC/AC converter 62. The output of the first left-hand DC/AC converter 60 is connected to the input of the first right-hand electric drive motor 18. The output of the first right-hand DC/AC converter 62 is connected to the input of the first right-hand electric drive motor 14. The second generator 8, the second amplifier 64, the second right and left DC/AC converters 66, 68 and the right and left second electric drive motors 16, 20 are wired in the corresponding way.
By virtue of the redundant presence of the components and the way they are wired, very great operational security is achieved even when the drive unit is partially damaged. Due to the structure of the drive unit according to the invention, the necessary drive power is produced and transmitted by several small components. Due to the use of components that take up only little space, the structural space available can be used more flexibly. Since no individual component has to be designed to provide all the power required, the components used can be readily available, inexpensive and mass-produced ones.
List of index numbers
left-hand drive track
right-hand drive track
first electric generator
second electric generator
first internal combustion engine
second internal combustion engine
first right-hand electric drive motor
second right-hand electric drive
first left-hand electric drive motor
second left-hand electric drive motor
track drive wheel
track drive wheel
first left-hand DC/AC converter
first right-hand DC/AC converter
second left-hand DC/AC converter
second right-hand DC/AC converter
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|U.S. Classification||180/6.7, 180/65.265, 180/65.6, 180/9.23, 180/65.22|
|International Classification||B60K17/12, B62D55/00, B60K6/46, B60K5/08|
|Cooperative Classification||B60Y2200/25, B60K5/08, B60K6/46, B60K17/12, Y02T10/6217, B62D55/00|
|European Classification||B60K17/12, B62D55/00, B60K6/46|
|Jul 18, 2002||AS||Assignment|
Owner name: ZF FRIEDRICHSHAFEN AG, GERMANY
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:WOLFGANG, WERNER;HUND, HUBERT;ROSCH, THOMAS;AND OTHERS;REEL/FRAME:013284/0033;SIGNING DATES FROM 20020603 TO 20020615
|Jul 20, 2007||FPAY||Fee payment|
Year of fee payment: 4
|Jul 21, 2011||FPAY||Fee payment|
Year of fee payment: 8
|Sep 25, 2015||REMI||Maintenance fee reminder mailed|
|Feb 17, 2016||LAPS||Lapse for failure to pay maintenance fees|
|Apr 5, 2016||FP||Expired due to failure to pay maintenance fee|
Effective date: 20160217